Grain-cutting roll



REWS ET AL CUTTING ROLL E. c. AN

GRAIN Aug. 6, 1929.

Filed oct. 17, 1925 mm m Patented Aug. 6, 1929.

UNITED STATES PATENT OFFICE.

EDWARD C. ANDREWS, F ST. LOUIS, MISSOURI, AND MAX LINDEMANN, 0F EAST ST. LOUIS, ILLINOIS; SAID LINDEMANN ASSIGNOR TO SAID ANDREWS.

GRAIN-CUTTING ROLL.

Application filed October 17, 1925.

This invention relates to a novel construction of corrugated rolls for use in reducing grains to granules o-f varying sizes by substantially a cutting action, as distinct from r the corrugated rolls now in general use for o producing cracked grains. The invention 1s particularly applicable for manufacturing cracked grain for use as poultry feed.

In the manufacture of this product, as heretofore practiced, the cracking of the grains by causing them to be passed between rollers separated at such distance as will tend to disrupt or fracture the grain, as disinct from powdering or grinding it, much r meal is produced, and this is a disadvantage, fer the reason that cracked grain, by weight, commands a higher price than meals of the same grains, 'The present invention is designed to overcome this disadvantage by producing rolls of such construction that when operated in pairs, the grains will be cut into granules of the desired size, with the minimum reduction of meal.

To t is end, the invention consists in pro- 2, viding a pair of rolls having corrugated suro faces, the lines of corrugationsextending spirally over the surface of each roll from one end to the other at such angle that when any two lines or cutting edges forming the boundary of a concavity or corrugation on one roll, intersect, in the revolution of the rolls, two similar lines on the other roll, they will form a quadrilateral figure having the shape of a parallelogram, which figure,

v in practice, will usually approximate the 'D shape of a square or a diamond. The lines ofvcorrugations extend in the same direction on the two rolls, and if these lines have an (ngle of 450, the figure made by the intersection of the parallel cutting edges of the respective rolls will be rectangular. If the lines of corrugation have a less or greater degree of inclination than 45", the figure made by the intersection of two corresponding parallel lines on the two rolls will be substantially the shape of a diamond, ory some other substantially similar figure deviating from that of a square. The lines or edges of the corrugations are sharp, or knife-edged, and hence they will cut through the Drain, as distinguished from crushing it, and, as stated, will reduce the grain to granular ferm, with lthe minimum prcducn tien of meat Serial No. 62,959.

The invention is illustrated in the accompanying drawing, in which- Figure l is a plan View illustrating a pair of rolls constructed according to our inven` tion, with the conventional driving means therefor.;

Figure 2 is a broken cross-sectional view on an enlarged scale showing a portion of the two rolls at the meeting sides thereof;

Figure 3 is an ideal sectional View taken on the line 3 3 of Figure 2, illustrating the angles at which the cutting edges of the respective rolls intersect in the rotation of the rolls; and

Figure 4 is a diagrammatic View illustrating the angularity or direction of a single groove or corrugation on the roll.

Referring now to the drawing, the minierals l and 2 indicate, respectively, two rolls constructed according to our invention and mounted at opposite ends in bearings 3 in a suitable roll box, or other character of support, indicated generally by the numeral 4. At one end, the shaft 5 of each roll extends beyond the support 4 and has secured thereon a gear wheel 6, these gear wheels being of the same size, or of different sizes, if desired, and intermeshing. On one of the shafts 5 is mounted a driving pulley 7, although the rolls may be driven in any other desired way. Each of the rolls l, 2, has its surface pro vided with a series 0f spirally disposed corrugations, the corrugations on the roll 1 being indicated by the numeral 8, and those on the roll 2, by the numeral 9, which corrugations run in the same direction on the two rolls. Each of these lines of corrugations extends at an angle of substantially 45 around the surface of the roll. That is to say, it Will intersect an imaginary line (Figure 4) drawn on the surface of the cylinder parallel with its axis at such inclination that the opposite angles will be equal to As the rolls 1 and 2 rotate toward each other, and as the corrugations on the two rolls extend in the saine direction, it follows, as shown by Figure 3, that the cutting edges of the corrugations on the two rolls will intersect to form squares, and the grains fed into the trough between the two rolls, shown in Figure 2, will be cut into sections in the forni of squares or parallelograms, or ifrures approximatn these. As the knife e ges of the corrugations will more readily penetrate or cut the grains than Crush them, a minimum of meal Will be produced by the action of the rolls.

While We prefer, and in actual practice have used, corrugations having an angular extension of 450, this angular-ity may be varied to a greater or less degree within certain limits Without departing from the spirit of our invention as delined in our claims.

According to the width and depth of the corrugations, the granules produced may vary in size from that, say, ot cracked corn down to substantially any required degree of ineness.

We claim:

l. A pair of rolls for use in cutting grain into sections arranged to rotate With their surfaces in close proximity to each other, the surface of each oir' said rolls being provided With parallel corrugations affording intervening cutting edges and extending in the same direction on each roll at an angle of substantially forty-live degrees to the axis of the rolls, the depth of the corrugations and the degree of proximity of the rolls to each other being such that the respective cutting edges of the rolls Will cut through the entire body of the grains passing between the rolls. 2. A pair of rolls for use inV cutting grain into sections arranged to rotate With their surfaces inclose proximity to each other, the v I surfaces of the rolls being provided with parallel lines of corrugations extending longitudinally of the roll and ai'lording intervening cutting edges, the depth or the corrugations and the degree ot proximity ot' the rolls to each other being such that the respective cutting edges of the rollswill cut through the entire body of the grains passing between the rolls, and the angular extension of the lines of corrugations on 'the rolls being such that When, in opposition, the intersection of eaeh pair of cutting edges on Athe respective rolls Will forni la quadrilateral spective cutting edges or' the rolls will cut 55 through the entire body of the grains pass- ,Y

ing. betweentho rolls, and the angular extenf sion et ther lines of eorrugations on the rolls being such that QWhen, in opposition, .the intersectionjoi' eachpairof cutting edges on V60 the respective rolls will `forni a substantially rectangular ligure. Y

in testimony whereof, We` have hereunto set our hands. v Y

' EDWARD C; ANDREWS.

LINDEMANN. 

